Nantucket (ACK) to New York (JFK): On-Time Performance
Data through July 2026
Nantucket (ACK) to New York (JFK) is a thinner route than most in this dataset — 301 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 70% arrived on time, noticeably below the national average of 78%. Cancellations are the bigger caveat: 8.1% of scheduled flights never departed.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 29 min
- completed flights
- Cancelled
- 8.1%
- Flights/day
- 0.82
- last 12 months
- Duration
- 1h 15m
- scheduled
- Distance
- 199 mi
Best airline from ACK to JFK
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 73% | 29 min | 7.6% | 474 |
| Republic Airways | 63% | 29 min | 9.0% | 245 |
Monthly on-time trend
Best time to fly from ACK to JFK
Aim for departures around 5 p.m. (82% on-time); avoid 3 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 64% | 49 min |
| Tuesday | 74% | 24 min |
| Wednesday | 70% | 23 min |
| Thursday | 66% | 29 min |
| Fridaybest | 77% | 20 min |
| Saturday | 76% | 19 min |
| Sunday | 60% | 39 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft29%
- Airline operations27%
- National airspace system40%
- Weather4%
Frequently asked questions
- How often are flights from ACK to JFK delayed?
- 30% of ACK–JFK flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 29 minutes.
- Which airline is most reliable from ACK to JFK?
- JetBlue Airways has the best on-time record on this route at 73%, based on 474 flights. 2 airlines flew ACK–JFK frequently enough to compare in this period.
- What is the best time of day to fly from ACK to JFK?
- Departures around 5 p.m. have the best record (82% on-time), while departures around 3 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ACK to JFK?
- The scheduled ACK–JFK flight time averages 1h 15m over 199 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are ACK to JFK flights cancelled?
- 8.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for ACK to JFK?
- Friday flights have the best record at 77% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 60%.
Explore related pages
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Based on 719 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.